Faller guide for gill boxes



Aug. 2,' 1960 R. GARmER FALLER GUIDE FOR GILL BOXES 3 Sheets-Sheet- 1 Filed Nov. 25, 1955 tr-3 A INVENTOR ROBERT GARTNER 1960 R. GARTNER 2,947,037

FALLER GUIDE FOR- GILL BOXES Filed Nov. 25, 1955 3 Sheets-Sheet 2.

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IN VENTOR ROBERT GARTNER fi 1 94 M A 60 R. GARTNER 2,947,037

FALLER GUIDE FOR GILL BOXES Filed Nov. 25, 1955 5 Sheets-Sheet 3 INVENTOR ROBERT GARTNER ATTORNEY United States Patent 2,947,037 FALLER GUIDE FORGILLBOXES Robert Giirtner, Ingolstadt, Germany, assignor to "Deutscher Spinnereimaschinenbau Ingolstadt Niederlassung iler Schubert & Salzer Maschinenfabi'ik-Aktiengesellin the faller guide construction for gill boxes and intersecting gill boxes in which the fallers are horizontally advanced and retracted by means'of screws and in which hammers are arranged at the ends of these screws for the vertical displacement, of the fallers inltheir end position from their working position'to theirreturn position and vice vers'a. I

In the prior known construction of faller drives of intersecting gill boxes of this type the'rtransfer of the 'falle'r'after it had passed into its end'position'wasefiected upon impact by rotating hammers acting on thefaller ends. Upon this striking the faller would be thrown against the slide rails or comb guides which limit its vertical motion and would be abruptly stopped upon'co'minginto contact with these parts. In the case of gill boxes the knocking of'the fallers out'of their operating position into their return position took place in the same manner with a violent impact upon the hitting of the hammer against the faller ends and upon the coming of the taller ends against the horizontal slide rails. As a resultof'these impact-like forces'to which these conventional fathers and their guideswere subjected, extensive wear of the stop and slide surfaces would occur and the "gill boxes would benoisy and vibrate in operation.

Various attempts have been made to dampen the striking of the hammers against thefallerends. "In accordance withone proposal, as setforth in Germanj Patent No. 451,222, the impact surfaces at the ends of the fallers wereLshaped so'that the hammer would come in sliding contact therewith. In order to reduce the striking ofthe fallers against their slide rails, various'resilient-means have been proposed, such as butler springs, and leather orrubber butters. Similar measures used in connection with thestriking hammers have proven' somewhat e'fiec- 't'ive' provided that the speed of the 'gill box and the'numher of faller'lifts is not too excessive. In the case of rapidly operating gill boxes, however, having for example, 1,000 or more faller lifts per minute there'takes place despite the aforementioned expedie'nts, heavy impacts, high wear and a chattering and canting of the falle'rs moving back-and forth between the hammerand slide rail which impairs a clean verticalyinsertion into the fiber material to be drawn and an impact-free removal of the pins from the sliver and which will n'ot permit continuous operation of the gill box with satisfactory drawing.

One object of this invention is to overcome the above mentioned disadvantages while allowing an increased speed and capacity of the gill box. Thisand still'turther objectswill become apparent from thefollowing description read in conjunction with the drawings in which:

"Figs. 1 through 4 diagrammatically show an embodi ment of a faller endguided between arr-acceleration cam and braking earn in accordance with the invention viewed in the direction of the axis of the screw 'infouudifierent stages of the vertical displacementof'thetaller end from its return position to its operating position, -:=Fig.w5yis "a diagrammatic perspective-:view:showing the ice movement of the :faller guideof an intersecting gill 'box, 'Fig. 6 is a .diagrammatio'side elevation viewed .in the directionof the axis of the screw showing an arrangement o f-fallers inan intersecting gill box, V

)Fig. 7 is a side elevation showing an embodiment of a butting or initial running-on surface forming a continuation of the threads of the advance or return screw in accordance with the invention which serves to introduce or brake the horizontal motion of the fallers,

Fig. 8 is a plan ,view of the running-on surface shown in Fig. 7, a

V (Fig. 9" is a side elevation showing a pair ofcams and a faller end in accordance with the invention as arranged on the advance and return-screw andhaving a connected. runningon surfaces as shown in Figs. 7 and 8, and

Figs. 10 and 11 are diagrammatic side elevations: viewed in the direction of the screw spindle of embodi-- ments of fallers and sliderails in accordance with the: invention. p

In accordance with the inventiomeach individual talleris so raised or-lowered into its return position at'the end: of the drawing field after completing its horizontal mo-- tion, that it is accelerated during the first part of its verand'is thereupon, during thesecond part of its vertical.

displacement, supported by a retarding or decelerating: cam and so controlled or decelerated that its lifting speed; continuously decreasesand then drops to Zero as soon: as the faller has reached its returnposition.

For this purpose, bothtaller ends are so developed that their narrow sides facing the needle field, in connection-with the fallers which are in operating position, rest against the spindles of the two advancing screws, and at the end of the pin field, after the completion of the horizontal movement are grasped completely free of impact, by means of slide surface for the acceleration cams provided tangentially on thescrew spindle, and thereupon continuously accelerated and displaced in vertical direction. With the accelerating cam arranged on the end-of the advance screw, there cooperates the braking cam seated on the front end of the corresponding return screw. This latter cam enters into operation in particular duringthe second portion of the vertical move ment of the taller inthat it continuously moves the taller end, corresponding'to its slide path tangentially meeting the spindle of the return screw to saidspindle and in this connectiongradually reduces the speed to zero. The lifting cams seated on the end of the return spindle 'act in a similar manner and cooperate with the braking cams arranged at [the start of the advance spindle and associated with them, and return the individual fallers from their'return position into their operating, position without impact.

In this way the two ends of each individual faller during its vertical transference from the operating position into the return position and vice versa are no longer, as heretoforecustomary, guided only on one side by means of'the accelerating cam but, rather, they are now positively guided in-alocked manner, free of impact, on both sides between an accelerating cam and "a retarding or braking cam" cooperatingwith same, over the entire vertical path. In this way theprevious disadvantage of the taller and being acceleratedabruptly by the impactrreceived from the accelerating cam, moving away from the hammer and continuing its further path until striking against the slide rail without control, is avoided. Instead of the hereto-- fore unavoidable, uncontrolled acceleration of the fallers.

in vertical direction, there is an impact free lifting orlowering motioncontrolled by-the guide surfaces of-fthe:

pair of cams, which surfaces are constantly in contact with the faller end.

In accordance with another feature of the invention, the horizontal advance motion transmitted to the fallers by the return and advance screws, in the same manner as their vertical motion is introduced by means of bent, suitably developed guide surfaces arranged on the ends of the screws, in which connection the'fallers are first'of all continuously accelerated to the proper amount of forward motion and, at the end of their horizontal path, are retarded and stopped in the'same manner before the raising or lowering motion starts. In accordance with a still further feature of the invention measures are 'also pro.- vided for the insertion of the fallers in a suitable manner between the screws and for their removal again from the gill box if necessary.

Referring to the drawings in Figs. 1 to 4 which may represent the lower faller of an intersecting gill box or the faller of anordinary gill box, the advance screw or worm is designated 1 and the return screw or worm 2; the accelerating cam is designated I, the braking or retarding cam II, and the faller end 3 is guided in a form-locked and impact-free manner between these two cams.

In Fig. l the faller is still in its operating position a the end of the field of pins, just before the commencement of its vertical displacement downward into its return posi- The faller end 3 has therefore reached the end of tion. the thread of the advance screw rotating in the direction indicated by the arrow P and at this place its edge 3' facing the pin field comes into contact with the slide surface I of the advance screw 1, which surface is tangentially connected to the screw spindle 1. The slide surface II of the retarding cam seated at the end of the return screw 2 has at this moment just reached the narrow sides 3" of the faller end. Upon further turning of the two screws and cams in the direction indicated by the arrow P, the faller end 3 which at first, as shown in Fig. 1, is still resting against the screw spindle 1 of the advance screw is grasped by the slide path I of the rotating accelerating cam. Since this slide path I terminates tangentially in the cylindrical surface 1' of the spindle, the vertical impact-free motion of the faller in the direction indicated by the arrow A commences. The faller end 3 is thereupon, as shown in Figs.2 and 3, moved further until it comes into its return position, shown in Fig. 4. The individual stages of this downward motion are shown in Figs. 2, 3 and 4, together with the corresponding positions of the cam pairs which guide the faller end. At the end of this downward motion the faller end 3, as shown in Fig. 4, passes from the slide surface II of the braking cam, which terminates tangentially into the cylindrical surface of the screwspindle 2', without impact, into the return position of the faller, whereupon its horizontal return motion is introduced by means of the running-on surface 4 shown in Figs. 7, 8 and 9. The return screw thereupon takes over the return motion of the faller.

The entire movement of the fallers is shown in Fig. 5. In this diagrammatic representation, the pairs of cams arranged on the ends of the screw pairs 10, 20, lu, 2a as well as the running-on surfaces which introduce and brake the horizontal displacement of the fallers 30 and 3;! respectively are not shown in order to simplify the illlustration. In the left upper fourth of this figure, there are shown at B and V the accelerating and retarding sections respectively of the vertical faller motion controlled by the pairs of cams and at B and V' the accelerating and retarding sections respectively, influenced by the running-on .4 indicated by the arrow W by means of the rotating screw on its spindle end without impact or they introduce, in the direction of the arrow W, the start of the horizontal motion of the faller. h

The running-on surfaces, as may be noted, merely constitute a continuation of the screw thread running along the cams and decreasing in pitch in the direction away from the central "portion of the screw so that, as the faller runs off from the. screw onto the running-on surfaces, its horizontal motion, in the direction W, constantly decreases to zero and as the same moves from the runningon surface on to the screw in the direction W, its horizontal motion steadily increases from zero until it reaches the velocity that'will be imparted by the screw as it runs onto the screw. These running-on surfaces thus replace the otherwise customary resilient guide bars, known as comb guides at the striking places of the fallers. It ispossible to do without these striking surfaces 4 on the pairs of cams, in which case the pairs of cams I, II in accordance with the invention then cooperate with the known guide bars provided with shock absorbing means.

The gill boxes are provided with a slide rail in order to maintain the fallers in engagement with the threads of the screw during the horizontal motion. In certain of the figures the slide rails have not been shown for convenience of illustration. The slide rail 5 is illustrated, however in Figures 10 and 11. It extends parallelly between the screws 1 and 2 over the length of the screws, terminating at the screw end so that the fallers can effect their vertical motion past the slide rails.

From Fig. 10 there can be noted the manner in which a faller can be inserted or removed. For this purpose, the slide rail 5 arranged between the fallers 3a which are in operating position and the fallers 3r which are in return position is pulled back by means of a holding member serving for its support, for example, the pin 6, horizontally into the position 5' shown in dotted line, whereupon it is possible to bring the other end of the faller to, be inserted into the position 3a shown in dotted line. This makes it possibleto insert the other faller end, not shown in the drawing, into the screw corresponding to it, whereupon the faller 3a is pushed back into its operating position, shown in solid line, and secured in the operating position by pushing the slide rail forward into the position 5 in such a manner that the faller 3a cannot slide out of the advance screw 1. The. slide rail 5 at the same time also secures the fallers 3r which are in the return position.

In Fig. 11 there is shown another possible development of the faller end, which makes possible the movement and supporting of the fallers in the same manner. While the invention has been described in detail with reference to the specific embodiments shown, various changes and modifications will become apparent to the skilled artisan which fall within the spirit of the invention and the scope of the appended claims.

Iclaim:

1. In a gill box having horizontal advance and return screws and a faller movable horizontally along said screws upon rotation thereof and vertically between the screw ends from the advance screw to the return screw at one end and from the return screw to the advance screw at the other end, the improvement which comprises a separate acceleration cam positioned at said first mentioned end of said advance screw and said second mentioned end of said return screw and a separate braking cam positioned at said second mentioned end of said advance screw and said first mentioned end of said return screw, said acceleration cams and braking cams being shaped and dimensioned to hold and guide the faller therebetween over its path of vertical motion, the acceleration cams being shaped to accelerate the-faller over a first portion of its vertical motion, and said braking cams being dimensioned to decelerate the faller of w an the remaining portion of its vertical motion to about zero velocity at the screw spindles.

2. Improvement according to claim 1 in which the surface of each cam terminates tangentially at the spindle of the screw on which it is positioned.

3. Improvement according to claim 1 in which said cams define running-on surfaces extending as a continuation of the threads of the screws on which the cams are positioned and decreasing in pitch the direction away from the central portion of the screw.

4. Improvement according to claim 1 including a slide rail positioned between said advance and return screws extending parallel thereto for maintaining the faller in engagement with the threads of said screw.

5. Improvement according to claim 4 in which said slide rail is laterally movable for the insertion or removal of a faller.

6. In a gill box having horizontal advance and return screws a faller movable horizontally along said screws upon rotation thereof and vertically between the screw ends from the advance screw to the return screw at one end and from the return screw to the advance screw at the other end and means for breaking the forward inertia of the faller bars at the end of the advance screws which means stop the horizontal progress of the faller bars as they leave the advance screws, the improvement which comprises a separate acceleration cam positioned at said first mentioned end of said advance screw and said second mentioned end of said return screw, said acceleration cams being shaped and dimensioned to accelerate the taller over a first portion of its vertical motion and having a cam surface which terminates tangentially at the spindle of the screw to which it is attached.

7. Improvement according to claim 6 in which said cams define running-on surfaces extending as a continuation of the thread of the screw on which the cam is positioned and decreasing in pitch in the direction away from the central portion of the screw.

References Cited in the file of this patent UNITED STATES PATENTS 1,673,407 Holdsworth June 12, 1928 1,876,936 Holdsworth Sept. 13, 1932.

FOREIGN PATENTS 269,385 Great Britain Apr. 21, 192.7 

